Window lock



Dec 25 1923. 1,478,871

A. W. EMERSON WINDOW LOCK Filed Nov. 28. 1921 fi s v 5 -& %J*

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Patented Dec. 25, 1923.

ALFRED W. EMERSON, OE MILLBR-IDGE, MAINE.

wiNDow LOCK.

Application filed N overnber 28, 1921. Serial No. 518,359.

To all whom it may concern:

Be it known that I, ALFREDW. EMERSON,

a citizen of the United States, residing at Millbridge, in the county 'of Washington, State of Maine, have invented certain new and useful Improvements in Window Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates tonew and useful improvements in window sash holders and fasteners.

One object of the invention is to provide a device of this character which combines a sash lock and a sash holder, and by means of which a window sash may be held in any degree of elevation, and may also be locked in comparatively open or closed position.

Another object is to provide a device of this character wherein there is contained a single means for operating the locking portion and the holding portion.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is an elevation of a portion of a window frame showing the invention applied thereto and the act of holding the sash in partly elevated position, the sash being shown in section.

Figure 2 is a similar elevation but with the front of thecasing removed to show the interior mechanism of the lock.

Figure 3 is a transverse sectional view on the line 3-3 of Figure 2, showing the means for holding the operating means with the bolt extended into the socket of the sash.

Referring particularly to the accompanying drawing, 10 represents an elongated casing, which is secured to the vertical face of the side stile of the window frame adjacent the side rail of the sash. The side of the casing adjacent the sash is formed with an elongated longitudinal opening 11, ar-

ranged adjacent the upper end of the casing and a smaller clrcular opening 12 adjacent the lower end of the casing. In the opposite wall of the casing and in alignment with the opening 12 is an opening 13. Pivotally mounted on the pin 14 in the casing is a rubber faced cam 15 which moves through the opening 11 for engagement with the adjacent face of the sidestile of the sash 16. The other end of the cam 15 is bifurcated as at 17 to receive a pin 18 carried by a bolt 19 slidable transversely of the casing and in the said opening 13. The inner end of the bolt 19 is reduced and cylindrical in shape as shown at 20 for movement through the opening 12 for engagement in one or the other of the sockets 21 carried by the side rail of the sash. The cam is so mounted as to be readily moved by the sash when the sash is being raised, but will firmly grip the face of the sash and hold the same against downward movement, as will be readily understood. When the'sash is to be lowered, the bolt 19 is pushed inwardly which results in the 7 pin 18 rocking the cam 15 out of engagement with the sash. When'the sash is tobe locked in either closed. position or in fully open position, the bolt 19 is pushed sufficiently far through the casing 10 to project the end 20 through'the opening 12 and into one or the other of the sockets 21. To maintain the bolt in this position and thus hold the sash opened or closed, the wall of the casing outwardly of the opening 13 is turned at right angles as shown at 22, to be engaged by the inwardly turned'lip 23 of the hook end 24 of the bolt. There is enough loose motion of the bolt within the casing to permit the bolt to be so rocked as to engage or disengage this lip 23 with relation to the portion 22 of the casing. A coil spring 25 engages its opposite end with the rear face of the cam 15 and the opposite wall of the casing 10 so that the cam is normally projected through the opening 11 into frictional engagement with the sash.

In the ordinary'operation of the device, when the window is to be raised, it is not necessary to manipulate the lock, by reason of the fact that the curve of the cam is such that it will readily slide on the face of the sash as the sash is raised. When the sash is released, the frictional contact thereof with the cam swings the cam on its pivot and firmly sash.

The initial movement of the bolt 19 is sufiicient to release the cam from the sash when it is to be lowered, but further movement of the bolt is necessary to engage the end 20 in one of thesockets 21.

It will be further noted that the spring engages the rubber face against the 25 serves to urge the cam into engagement it-11 6 s rail, and also to u g h bolt 'tor engagement with a, window sash, a

locking bolt operative/1y engaged with the cam for movement ofthe cam out of en gagement with the window sash upon initial movement, and for positive locking engagement with the sash upon furtherv movement, andinea'ns on the locking bolt for engage ment with: thecasing', to hold said bolt in lokihg Pos ti n 7 a I, 2Q Ar combj'ned' sa'shi holder andilocl; comp i in t sing; a a m mber ii e sing ton engagement with a window sash, a l0ngitt1dihally; and transversely movable o' k a t perat ves n ed w h camtor movement, of the cam out ot eneas m i hl h ndow' aShL P o itudinal movementin the casingand tor posi' tive locking' engageinentfwith the 'sashupon transversezmoven ent in the foasing, the casing having an externally angularly turned flange, and a hook portion on the bolt for engagement with sa1d flange upon transverse and longiutdinal movement to hold the bolt in sash engaging position.

3. A combined sash holder and lock comprising a casing, a cam mounted therein for projection through one side thereof, a bolt mounted in the casing for projection through said side of the casing, operative connections between theoam and bolt tor actuation of the former into the casing upon movement of the latter from the casing, the bolt being movable laterally. in:the casing, a projection on the casing, a hook on the bolt engageable with the projection upon longitudinal and lateral movement of the/bolt, and a spring between fthefcam and casing for normally urging the cam trom thecasing-and the bolt 5 into the casing, and for releasably holding the hook ot the bolt in engagement with said projection.

In testlmony whereof, I aflix my signature, in the. presence ot; two witnesses:

"ALFBE'DW; EMERSON. Witnesses; i

ARR E J -B Q RITA U, BROWN, 

